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Thomas Seifert
Director of Finance/CFO at
CLOUDFLARE, INC.
Net worth: 124 M $ as of 2026-05-30
Profile
Currently, Thomas Josef Seifert is Chief Financial Officer of Cloudflare, Inc. Mr. Seifert is also on the board of IPG Photonics Corp., First Derivatives Plc and Virginia Commonwealth University School of Engineering Fdn. Mr. Seifert previously occupied the position of Senior VP, Chief Financial & Accounting Officer at Advanced Micro Devices, Inc., Chief Executive Officer for White Oak Semiconductor, Chief Financial Officer & Executive Vice President of NortonLifeLock, Inc., Chief Financial Officer & Executive Vice President at Brightstar International Corp., Principal at Siemens AG, Senior Vice President & GM-Wireless Business Group at Infineon Technologies AG and Chief Operating & Financial Officer of Qimonda AG (a subsidiary of Infineon Technologies AG) and Principal at Altis Semiconductor SNC. Thomas Josef Seifert received a graduate degree from Wayne State University (Michigan) and an MBA and an undergraduate degree from Friedrich-Alexander University of Erlangen-Nuremberg.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
CLOUDFLARE INC 0.65% | 2026-05-17 | 297,225 ( 0.65% ) | 72 M $ | 2026-05-30 |
| 2026-05-17 | 212,014 ( 0.07% ) | 51 M $ | 2026-05-30 | |
WOLFSPEED INC 0.04% | 2025-02-02 | 20,476 ( 0.04% ) | 1 M $ | 2026-05-30 |
Thomas Seifert active positions
| Companies | Position | Start |
|---|---|---|
| CLOUDFLARE, INC. | Director of Finance/CFO | 2017-05-31 |
Virginia Commonwealth University School of Engineering Fdn | Director/Board Member | 2011-06-23 |
Former positions of Thomas Seifert
| Companies | Position | End |
|---|---|---|
| FD TECHNOLOGIES PLC | Director/Board Member | 2025-07-20 |
| WOLFSPEED, INC. | Director/Board Member | 2025-04-02 |
| IPG PHOTONICS CORPORATION | Director/Board Member | 2023-02-16 |
| COMPUGROUP MEDICAL SE & CO. KGAA | Director/Board Member | 2020-05-31 |
| GEN DIGITAL INC. | Director of Finance/CFO | 2016-10-31 |
Training of Thomas Seifert
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
70
1st degree connections
16
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 16 |
|---|---|
Advanced Micro Devices, Inc.
 Advanced Micro Devices, Inc. SemiconductorsElectronic Technology Manufactures integrated circuits for semiconductors | Electronic Technology |
Gen Digital Inc.
 Gen Digital Inc. Packaged SoftwareTechnology Services Provides cyber safety software and operating system solutions | Technology Services |
Wolfspeed, Inc.
 Wolfspeed, Inc. SemiconductorsElectronic Technology Develops and manufactures semiconductors & related devices | Electronic Technology |
Siemens AG
 Siemens AG Industrial MachineryProducer Manufacturing Develops, manufactures and sells diagnostic and therapeutic products & automation systems | Producer Manufacturing |
IPG Photonics Corp.
 IPG Photonics Corp. SemiconductorsElectronic Technology Designs, develops and manufactures fiber lasers and amplifiers for semiconductors | Electronic Technology |
Infineon Technologies AG
 Infineon Technologies AG SemiconductorsElectronic Technology Provides semiconductor solutions | Electronic Technology |
FD Technologies Ltd.
 FD Technologies Ltd. Packaged SoftwareTechnology Services Provides platform and technology services to solve business-critical problems | Technology Services |
Cloudflare, Inc.
 Cloudflare, Inc. Information Technology ServicesTechnology Services Provides cloud-based services to secure websites | Technology Services |
Wayne State University (Michigan)
 Wayne State University (Michigan) Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
CompuGroup Medical SE & Co. KGaA
 CompuGroup Medical SE & Co. KGaA Services to the Health IndustryHealth Services Develops and distributes software products and provides information technology services for healthcare industry | Health Services |
Likewize Corp.
 Likewize Corp. Property/Casualty InsuranceFinance Provides insurance, warranty, repair, trade-in, recycling and support services for lost, stolen, damaged & malfunctioned tech devices | Finance |
Friedrich-Alexander University of Erlangen-Nuremberg
 Friedrich-Alexander University of Erlangen-Nuremberg Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Qimonda AG
 Qimonda AG Computer PeripheralsElectronic Technology Manufactures and markets computer memory products and semiconductors | Electronic Technology |
Altis Semiconductor SNC
 Altis Semiconductor SNC SemiconductorsElectronic Technology Manufactures semiconductor components | Electronic Technology |
Virginia Commonwealth University School of Engineering Fdn | |
White Oak Semiconductor
 White Oak Semiconductor SemiconductorsElectronic Technology Manufactures semiconductor | Electronic Technology |
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